Derivatives of 1,2,3,4-Tetrahydroisoquinoline-3-carboxylic Acid
作者:Vladimír Machácek、Petr Jansa、Valerio Bertolasi
DOI:10.3987/com-05-10571
日期:——
Synthesis of New Diketopiperazines, Thiolation to Thiodiketopiperazines, and Examination of Their ROS-Generating Properties
作者:Sabilla Zhong、Angela E. E. Wandler、Ute Schepers、Martin Nieger、Stefan Bräse
DOI:10.1002/ejoc.201500900
日期:2015.11
A variety of new symmetrical and unsymmetrical diketopiperazines have been prepared from free amino acids by using a previously developed microwave-assisted protocol. This included the successful incorporation of L-pyroglutamic acid as an unusual building block. The diketopiperazines were then thiolated electrophilically to the corresponding bis(methylthio)- and epidithiodiketopiperazines. Initial
通过使用先前开发的微波辅助方案,从游离氨基酸制备了各种新的对称和不对称二酮哌嗪。这包括成功地将 L-焦谷氨酸作为一种不寻常的构建块。然后将二酮哌嗪通过亲电巯基化为相应的双(甲硫基)-和桥二硫二酮哌嗪。最初的实验显示了在 HeLa 细胞中产生活性氧的有希望的活性。
All-<i>cis</i> Saturated 2,5-Diketopiperazines by a Diastereoselective Rhodium-Catalyzed Arene Hydrogenation
作者:Christian H. Schiwek、Christian Jandl、Thorsten Bach
DOI:10.1021/acscatal.2c00400
日期:2022.3.18
perform a highly diastereoselective arene hydrogenation of symmetric 2,5-DKPs catalyzed by a rhodium complex. Twenty-eight saturated pentacyclic 2,5-DKPs were obtained in high yields with exquisite diastereoselectivities, exhibiting the hydrogen atoms in an all-cis arrangement. The high tolerance toward functional groups and the compatibility with existing stereogenic centers are key features of the transformation